You’ve won the Mega Millions jackpot! Time to hide.

So, you’ve done it. Beaten the odds—one in 302,575,350—and won the largest Mega Millions jackpot in history. And it’s yours alone, so you’re almost certainly about to enjoy an astronomical spike in wealth. Now what?

Before you shout from the rooftops or broadcast your excitement on social media, take a deep breath and keep some practical advice in mind.